noun
- The time from 3, 800 million years to 2, 500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life.
- synonyms: Archean eon, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeon
adjective
- Of or relating to the earliest known rocks formed during the Precambrian Eon.
- synonyms: archaean
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). archean. Retrieved September 20, 2026, from http://smartdefine.org/archean/definitions/1249828 |
| Chicago | WordNet. 2010. "archean" http://smartdefine.org/archean/definitions/1249828 (accessed September 20, 2026). |
| Harvard | WordNet 2010, archean, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/archean/definitions/1249828>. |
| MLA | WordNet. "archean" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/archean/definitions/1249828> |